Photographic apparatus



E. C. S. PARKER.

PHOTOGRAPHIC APPARATUS.

APPLICA'TION FILED MAY9.'I949.

Patented J an. 20, 1920.

E. C. S. IPARKER.

PHOIOGRA'PHIC APPARATUS. APPLICATION FILED MAY 9. F919.

1 ,328, 298- Patented'an. 20, 1920.

. l 2 SHEETS-SHEET 2.

UNTD STTESPATNT OFFICE.

a EDWARD C. s.' PARKER. 0F THE UNITED STATES NAVY.

rnotrocfnarnic Arrena'rus.

I T all whom 'it may concern.'

of the Unite'dStatesNavy, a citizen of the Be itv known that I, EDWARD C; S. PARKEI-i,

United States, haveinvented a certain new and useful Improvement in Photographic Apparatus, of which the following is a speclica'tion. V

The 'invention is an apparatus for making photographs. in monochrome from a colored object and projecting an image of said object; in corresponding `o r substantially naturalcolors upon suitable screen.l lThat is to .'say, the apparatusused as a camera produces images ofv the colored object in either v-statiomtryor moving, thelight then` proceeding from the object to the slide.

monochrome uponja sensitized transparent plate,.,film, orgfin" general terms "slide,

lVhen the light is causedt'o proceed inthe reverse direction-ethat j is, through the image-on the slide and 4so.throughv the appailatus-,to the screen-then an image of the object: projected'in vsubsta'lntiall f natural colors upon said screen and eit er as a.

stationary.A or moving picture. lThe invention consists more particularly 1n 'the construction' and arrangement of the lenses and' means g for Y dividing the pencil traversing thesame into a'plurality of separatedpen- Ingthe accompanying drawings- -Figurel1 is anoptical diagram, showing the arrangementof thelenses for producin 'two'imagesfofthe object upon a sen-vv sitlzed slide and `for pnoj'e'ctmg said images las al's'ingle image in colors upon a screen. .F1g.j2l.1s aiv perspective view, showlngthe shape of lensf'A. lF 3 1s a simllar View,

two narrowed images produced by the apparatusj-or` Fig. 1 -ona sensitized slide. Fig. 6 is an optical diagraml 'showing the arrangement of the lensesf) for producing three images of the object and for project. ing said images-as a single image in `colors upon-a screen.- Fig. 7 is a perspectiveview f the shape of lenses I', J, K, indicating by dottedlineshow said -lenses may' be'made by longitudinally v*dividing into three sections a lens similar tole'nsB. Fig. 8 illus# A Specification of Letters I-Eatent. Patented Jan. 20, 19,20. v.Application led May 9, 1919. SerialtNo. 296g010. y

' A is a double convex cylindrical lens; two

edges 1, b of which are straight and formed by. the-junction of oppositely arcfshaped surfaces c, d. B -is a. plano-convex cylindrical lens; two edges 4e, f of-said lens are straight and are formed by the junctiontof.

the plane surface g and the arc-shaped surface h. The lens B is placed with the axis of its curved surfaces relatively perpendicular to theaxis ofthe curved surfaces of lens A, so vthat the -middle point of lens B will bein line with the middle point of lens MA, Should a pencil'of light from a given object traverse either lens A or lens B only,

there will-be produced upon a slide a more l or less confused appearance of intermingled masses oflight and shade. the. two lenses A and B are disposed with their axes relatively perpendicular as described, then an image .of the object is produced on the slide S, and this image will also 'be produced if the light pencil from When, however, l

lens A ktraverse a' vfraction of the lens B instead -of the whole lens.

To the plane side oflens B, I applypreferably by cementing-two cylindrical lenses C, D. Fig. l. Said lensesare alike..

and are of theshape produced by dividing a plano-convex cylindrical lens, as B, into two longitudinal interchangeable half sections on ithe dottedline Fig. 4. Said lenses C, D

are placed with their .edges j, L formed by the Junction of theirplane and curved sur-l faces abutting, as shown in Fig. l, each lens surface of lens B.

C. D then covering one half of the planeI The light pencil coming from an object as E anditraversing lenses 'A and B successively anddenses C and D simultaneously, will then cils respectively I place light filters F and r G. F ilter F .may be'of red glass and will,

therefore, cut off the'. green rays, and filter G maybe of green glass and wlll, therefore,

. is retained, the two filters must be exchanged,

cut offthey red rays. The two imagesl and ,2r on the sensitized slide will be in monochrome, but the image l will be made by light free from green rays and theimage 2 by light free from red rays. Ifthe object be in the shape of a parallelogram, for example, vas shown in Fig. 5 at E, then the two images l, 2 by reason of the shapes of the lenses will be narrowed in width; 'or in other words, the .ratio of 'the dimensions of each image ,1, 2 willV be di'erent from the ratio ofthe dimensions of the object The iniages'l, 2 being produced and fixed upon a transparent sensitized slide S, if the source of light noW be placed in rear of the slide so that the rays therefrom will pas's through the apparatus in the reverse direction-that is, through the slide, light filters and lenses-an image of the object in colors corresponding to those ofthe object (so far as is .possible by reproduction of red, green and combinations thereof) Will be projected upon any suitable screen. As the images on the slide will be negative, they should be changed to positive in theusual way before projection, if it be desired not to disturb the light filters. vOtherwise if the negative slide the green taking the place ofthe red and the red taking the place of the green. y

In Figs. 6, Z and 8, I -'llustrate the appa ratus as arranged for three color work.

Here three cylindrical lensesI, J, K, pref erably ot' equal width and eac-h covering one third ofv the plane surface of lens B, are

used-the shapes of said lenses beingsuch as would be produced if a lens similar to B were longitudinally divided into three sections on the .dotted lines Fig. 7. The lenses Iand K would then have the shape of the outer sections and the lens J of the middle section. The lens B is disposed between the edges Z, m of lenses I, K. The pencil from lenses A, B becomes divided into three pencils Which after traversing the three light filters L, M, N-whieh may be respectively red, blue and green-form three separate images 3,. 4, 5 of the object, as before, upon the sensitized slidevS. .And these images may be projected inthe manner already described to form a single picture on the screen in red, green and blue and combinations of said colors.- x

In another application for Letters Patent Serial No.v296,008 filed by me May 9, 1919, I have described and claimed the method of producing moving pictures which comprises forming a plurality of similarly deformed pictures of the object upon the film and then simultaneously projecting said deformed l pictures to reconstriict the projection in nortion of said first-named lens, theaxes of the cylindrical surfaces of all of said lenses 'being parallel: whereby a pencil of light when traversing saidhlenses in one direction Is divided into a plurality of separate pencils and whereby separate pencils traversing said i lenses in the opposite direction are caused to coalesce toform a'single pencil.

2. Means as set forth 1n claim 1, further including an additional cvlindricalk converging lens interposed in the-path of the rays forming saidfirst-narned pencil, the axis of the cylindrical surface of said additional lens being disposed perpendicular to the parallel axes of the cylindrical surfaces of the lenses set forth insaid claim.

In testimony whereof I have aiixed-niy signature in"presence o f twol witnesses.

EDWARD C. s. PARKER.

Witnesses:

GERTRUDE T. PORTER, MAY T. MCGARRY. 

